The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2026
Filed:
Dec. 12, 2022
Schott Ag, Mainz, DE;
Schott Technical Glass Solutions Gmbh, Jena, DE;
Lars Mueller, Wiesbaden, DE;
Ruediger Dietrich, Jena, DE;
Thomas Pfeiffer, Ingelheim, DE;
Julian Koch, Mainz, DE;
Bernd Ruedinger, Woerrstadt, DE;
Meike Schneider, Taunusstein, DE;
Jochen Alkemper, Klein-Winternheim, DE;
SCHOTT AG, Mainz, DE;
SCHOTT TECHNICAL GLASS SOLUTIONS GMBH, Jena, DE;
Abstract
A cover glass made of a glass ceramic that is silica based and has a main crystal phase of high quartz solid solution or keatite solid solution is provided. The cover glass has a stress profile with at least one inflection point at a depth of the cover glass of more than 10 μm, a thickness from 0.1 mm to 2 mm, and a chemical tempering structure with a surface compressive stress of at least 250 MPa and at most 1500 MPa. A process for producing the cover glass is provided that includes producing a silica based green glass, hot shaping the silica based green glass, thermally treating the silica based green glass with a nucleation step and a ceramization step, and performing an ion exchange at an exchange bath temperature for a duration of time in an exchange bath.